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,ss7 Patentad Apr. 4', i899. A. EPPLER, m. SEWING MACHINE.

(Application filed Fab. 21, 189B.)

5 Shear-Sham I.

' (No lludel.)

} INVENTU R: W Y 7" WITN E55 E 5:

No. 621,337. Patented Apr. 4, I899. A. EPPLER, 1R.

SEWING MACHINE.

(Application filed Fe? 21, 1898.) (No Modal.) 5 SheetsSheet 2.

No. 622,337 Patented Apr. 4, I899. A. EPPLER, 1R.

SEWING MACHINE.

(Application Med Feb. m, 1998. (No lodel.) 5 Sheots-Sheat 3.

Wfgm: 55E 5: MZNVENT [J R:

Patented Apr. 4, I899.

A. EPPLER, 1R. SEWING MACHINE.

(Application filed Feb. 21, 189B.)

5 Sheets-Sheet 4 (No Model.)

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I i: L/ "'0; L Mg; g,

WITNSSi-I 5: INVENTU M W W 2 1 4 4, QWLL No. 622,337. Patented Apr. 4, I899. A EPPLER In SEWING MACHINE (Apphcation filed Feb. 21, 1898.)

5 Sheets$heet 5 (No Model.)

WITN 55 E 5:

. an elevation from the side opposite tin-n shown l l N IT. 3n ST A e ANDREW EPPLER, JR 0F llOl'lYlfI,

EPPLEH vVliIL'i MA. (5 l 13 Nit.

QFFICE.

SEVJlMCbMAQlHNE...

Be it known that 1, 9mm w livid, of Boston,in the ceunty ef s nifolk and Stem; of Massachusetts, have invented eertein new and useful luiprovemenln in (innit chines, of which the follmving in it spin tion.

This inventien relates i01 .if1.t*ti-il '?1aliidouble-thread newingmachine of til". shown in Letters Patent nf the United I No. 538,639, such machine being adapted it; stitching outer sales to welie of weited em .4 and shoes.

The invention has er it. :hjee; to guru/id cert/win improvements; in a n of thin Chnraeterwith n 'iewei int-naming .te useful new and ei'iiuieney.

The in Venn on eons in the min-m1 which i will now prim d tr: demzr claim.

0f the accompanying drawings, forming a part of this speeitinntion, Figure lv represen s a front elevation of n sewing niachine enrbodying my invention. Fig: :3 represents ii side elevation of the same. lg. 23 represents in Fig. 2. Fig. t represents a top plain view. Figs. 5 and (3 reprenent views of parts of the machine and illustrating the tak np device. Figs. 7,-8, 9, and 1'.) are plan views of parts of the machine, iilnstrnting the opemiimi of the thread tinge and deeper.

The same letters of .referenee indien c the same parts in all the figures.

In the drawings, (1 represents the support lug-frame, having bearings for the driving ehaft b,which is provided with a se erntingname and disks liming min adapted to give motion to the v'flllOll-v of the machine.

0 represents the ourv ed 3.\'l,;i!ltl r! the nu rved needle. Said awi and needle are nilixed to arms which oscillate on a fixed stud is, the awl and needle being in the same plane neither having any lateral moveme t, so that when they are oscillated the uni .-lfow= needle, and vice verse, (LS in the m; forth in said Letters Patent No. mechanism for operating the eel may be as strewn in said patant, ta.

i i l i i i l i lent are l l i i l i l i l l l 5 Patent No. 622,337, dated April '1. 1899.

irf'ifllill'linnf.

it represents the loom-r, whieh presents the three-d to the needle and is operated in nner and preferably by the mechanism wed in said paient. 1' regpresentza: the \(Ol'k'nifl{lP Jrl/ll lg channel- 'de, which preferably fifty/R10 1 with a ,n'zj-tnhemnco 1', l ig. 1, adapted to enter the lnznnel in the uinlcrsnrfnce if the outersole hi it Welter: elme, said support being arranged Z to eoeperziie n ith the proseer feot j in holding the \ll'l't in the path Hi the nwl and needle. The channe UltlQ and presserioot have {L motion mil-one the path of the to they feed the work as de- ,lll l'll(1lll l ".?,533,639. ihave, wed the mechanism for ininnilferth movements to said tilting fer the oscillating head it in said patent as the carrier fer t he ch21 rind-guide and presserloot, a slide 1*, nn'walilnhurizoniiztlly in guides on thefrazne oi" the machine stnili'n'ovided at one end with wn'iicztl flange to whioll the channelide 2 is rigidly secured, the resser-foot j heingntizuzhed to n, iewn-j', mounted to oscilhtte on n ntinl mixed to snid flange. The e'ihle 5 is rear U means of it cant groov ,5" in. n. dish: on the driving-shaft and a love nnsnnt d to tlrdfllltlt) on it fixed vertical tud if, one arm of mid lever having a. iruinlieu'nll enteringenid can't-groove, while the other arm has at stud which connects the lever with n link-lever i, pivoted at W to the "1o 4'. 'lhe elinnnel- 'nideand pressertl zefwre given Lt rectilinear backmdi'orth 1m ill, insleml of nu usullldtul'y i innveinen so rim; they feed the Work more nil vantzzgeoi "ihe liniL-iever'i is prefernblymlapted wing on its pivot to adjust the stud i in n shlt in the lever i thus vars ing the length of the feed movernentini- A plate I O und r All. cx onsinn of the linkh series of orilict-e i. biiULF rim} in two of mid holes at o; u ides (ii. the enter end cf the link l- 'Y'dl' nsn'i limii the swinging movements of i i l i l l l l i i l the l l i cal to the elide.

2) differ from those shown in the said patent, but operate in the same way. They comprise a holding-down springj", adjustably secured at one end to an arm 7' on the leverj and attached at the other end to a pin j on the slide-flange a lever j, mounted to oscillate on a studj on the said flange, said lever having at one end a pivoted block 7' engaged with a slotj in the leverj', and a cam-groove in a disk on the driving-shaft, receiving a trundle-roll j on the other end of the leverj. The presser-foot serves as a guide to bear against a lasted shoe and is movable in and out to vary the distance of the stitches from the upper of the shoe by means of a loose eccentric collarj on the stud j", said collar constituting the bearing for the leverj. The collar may be partially rotated to vary the position of the presser-foot by means of an arm j, pivoted atj t0 the flange i and having a gear segmentj meshing with a gearsegmentj on the collarj A handle j", affixed to the arm j, plays between adjustable stops j j".

represents the oscillating shuttle, which may be of the form shown in Patent No. 533,639, and is mounted in a suitable carrier on a shaft k, which is oscillated by suitable connections with the driving-shaft, said con nections, as here shown, comprising a bevelgear k, affixed to the shaft, and a gear-segment 70 (shown in dotted lines in Fig. 3) on a lever k which is pivoted at k and has a trundle-roll 7t" entering a cam-groove k. The shuttle oscillates in a plane at right angles to the plane of the needle and cooperates with the needle in forming the stitches in the manner described in the above-mentioned patout, the shuttle being, however, preferably in a vertical plane instead of being inclined, shown in said patent.

111 represents a thread-finger which is adapted to engage the needle-thread at one side of the path of the needle as shown in Fig. 7, and to move diagonally ac oss the path of the needle, as indicated by the dotted line mm in Fig. 8, thus carrying the thread across the needlepath and holding it while the looper moves from the position shown in Figs. 7' and 8 to that shown in Fig. 9, the finger remaining in its thread-holding position until the needle engages the bight of;thread and then returning to its starting-point and releasing the thread, as shown in Fig. 10.

The means here shown for oscillating the fingermcompriseayokem', Figs. 1 and 3, pivoted to fixed ears in m and provided. with an arm m to which the finger m is attached. The yoke has ears m" m, to which aconnecting-rod m is pivoted, said rod being connected with a lever which is oscillated by a cam-groove. The center of oscillation of the finger m is in the ears in m The described diagonal movement of the thread-finger across the path of the needle enables the finger to cooperate with the looper in supplying loose thread to the needle between the work and the needle in such manner that the bight of thread nearly surrounds the needle while the barb is engaging it, as shown in Fig. 9. The engagement of the needle with the thread is thus rendered more certain than it would be if the thread-finger did not thus cross the needle-path; and the looper is enabled to accomplish its ,'function by a shorter movement than heretofore.

/2. represents a thread-dividin g finger, which enters the needle-loop and holds it in position to receive the point of the shuttle. ,Said finger is affixed to a lever 11', Fig. 2, which is'pivoted at n to a fixed support and has a trundle-roll n entering a cam-groove n. The arrangement is such that the thread-engaging end of the finger n moves diagonally across the path of the point of the shuttle, as indicated by the dotted line y 1 Figs. 1 and 2, without intersecting or coming within said path, so that there is no liability of contact between the finger and the shuttle.

The machine has an auxiliary take-up which comprises an arm 0, affixed to a rock shaft 0' and provided with sheaves o 0 which are separated'by a space adapted to receive a sheave 0, which is journaled in a slide 0 Said slide is vertically movable in a fixed guide 0 and is held down yieldingly bya spring 0'. The arm 0 is oscillated vertically by means of an arm 0", affixed to the rock shaft 0',and suitable connections between said arm 0 and the dlivingshaff. A tensionwheel p is mounted to rotate loosely on the rock-shaft 0' and has a ratchetp' affixed to it. A lever p pivoted at p to a fixed support, has at one end a spring-pressed dog p, adapted to engage the ratchet and lOLh'. the tensionwheel. The other end of the l ver F has a trundle-roll 1) bearing on a cam 2; on. the driving-shaft, said (-am being fin-med to al-- ternately raise the dog p, as shown in Fig. 5, and depress the same, as shown in Fig. 6, thus locking the tension-wheel The thread passes from the source of sup ply first through a guide 1; on the lever 1J2, then through a guide on the arm 0, then through another guidep" on the lever gt, then around the tension-wheel 1, and th: under a sheave p on a fixed support to tip. .;heave 0 from whence it passes under the weave 0 and over the sheave o to the looper. When the arm 0 is depressed, the yielding sheave o is held by its spring in the position shown in Fig. 5, and when said arm is raised the point at which the thread is locked in the Work is therefore determined by the position of the adjustable stop q. Said stop is formed on a slide q, movable vertically in a fixed guide and provided with an car (1 in which is journaled a rod (1 the lower portion of which is screw-threaded and engaged with a threaded socket in a fixed ear q, the rotation of the rod adjusting the stop g.

It will be seen that the take-up is composed of two sections, the arm 0 with its attachments constituting a positively-operated section, while the slide 0 and sheave 0" constiinto a yielding section.

The operation is as follows: The edge of the shoe-bottom is inserted between the channel-guide and prcsser-foot. and after the formation of each stitch the guide and foot move to the left, as viewed in Fig. 1, feeding the shoe before the awl advances to penetrate the work. At the end of the feed movement the awl pierces the material and the presser-foot thcn rises and moves back with the channelguide while the awl is in the material. The awl then retracts and the needle follows it through the same hole. While the needle is advancing the thread-linger m moves diagonally inward, taking thread from the supply end and holding the thread behind the needle. Then the looper moves partly around the needle, the finger and looper forming a long bight nearly encircling the needle and insuring its engagement with the barb of the needle. The take-up then releases the thread and the needle is retracted, the thread-finger at the same time swinging outward and dropping the loop, the finger swinging out of the plane of the needle and awl. The thread-di viding finger n then engages the loop and carries it into the path of the point of the shuttle, so that the shuttle can enter and pass through said loop in the usual manner, the tlu-ead-divider moving diagonally across the plane of the path of the point of the shuttle without intersecting said path, so that said thread-(1ividcrcannotstri ic the shuttle. The shuttle takes the loo whilv the divider is rising. \Vhen the shuttle has carried the thread to the lowest point, the tension locking device locks the thread, the locking taking place just before the take-up rises and before the needle commences to retract. The take-up then rises and sets the stitch, the point at which the threads are interlocked in the material being determined by the position of the adjustable stop q, as above stated.

I claim- 1. In a sewing-machine of the character specified, the combination with a curved needle and a curved awl both oscillating in aconstant given path, of a looper and suitable cooperating parts, and a slack-forming threadfinger, as m, movable in a single horizontal plane diagonally across the path of the needle, said finger being arranged to draw off the needle-thread between the needle and the Work to aid in forming a bight of slack thread between the work and the needle.

2. Inalock-stitch sewing-machine,the combination with the reciprocating curved needle, and a shuttle, and suitable cooperating parts, of a take-up comprising a positivelyoperatedthread-drawing section and a yielding thread-drawing section, and an adjustable stop for said yielding section, whereby the lock of thethreads may be located at any desired point in the thickness of the material.

3. In a lock-stitch sewing-machine of the character specified, the combination with the reciprocating curved needle. and a shuttle,

and suitable cooperating parts, of a take-up comprising a positively-operated arm 0 provided with sheaves 0 0 a slide having a sheave 0, a spring for exerting a yielding downward pull on the slide, and an adjustable stop for limiting the upward movement of the slide.

In estimony whereof I have afiixed my signature in presence of two witnesses.

ANI)RE\V lClILER, JR.

\Vitnesses:

MARcus 1 l\lAY, A. I). HARRISON. 

